Use Sterile Water
When possible use sterile water so you aren't putting harmful bacterias into your blood.
Use about 135 units for the first cook of one pill. You don't need to add very much for another pill.
A pill and a half would require about 145 units for the first cook.
Ask your needle exchange program for water, or purchase from drug store sterile water.
Even use bottled water that you drink in a pinch.